Enhancement of CO detection in Al doped graphene

Details Enhancement of CO detection in Al doped graphene Enhancement of CO detection in Al doped graphene

2008-06-19

arxiv.org/abs/0806.3172v1

Physics

Condensed Matter

Materials Science

16 pages and 4 figures

Scientific paper

10.1016/j.cplett.2008.07.039

A principle of enhancement CO adsorption was developed theoretically by using density functional theory through doping Al into graphene. The results show that the Al doped graphene has strong chemisorption of CO molecule by forming Al-CO bond, where CO onto intrinsic graphene remains weak physisorption. Furthermore, the enhancement of CO sensitivity in the Al doped graphene is determined by a large electrical conductivity change after adsorption, where CO absorption leads to increase of electrical conductivity upon via introducing large amount of shallow acceptor states. Therefore, this newly developed Al doped graphene would be an excellent candidate for sensing CO gas.

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